Rules & controls
One move means one clockwise arrow rotation. Truck steps are free. Click arrows in Playtest to rotate them while paused; you can edit future, passed or unused arrows. Start, dock and locked arrows cannot rotate.
Ice forces one extra step in the incoming direction; consecutive ice continues the slide. Barriers block both entry and exit on their closed sides. Signals cycle green → orange → red: each color lasts three arrow rotations. Offsets let signals start out of phase. Driving never advances a signal. A red light stops the truck before entry; rotate an arrow and continue. Visiting a tile twice fails the run.
Sketch starts at the parcel. Tap adjacent cells in order; tap the previous cell to backtrack. A sketch is a proposed route, independent of current arrow orientations. To replay a computed solution, choose a route in Analysis, enter Playtest and load its guide.